protected boolean shouldParenthesizeQualifier(
final PsiFile file, final int startOffset, final int endOffset) {
PsiElement element = file.findElementAt(startOffset);
if (element == null) {
return false;
}
PsiElement last = element;
while (element != null
&& element.getTextRange().getStartOffset() >= startOffset
&& element.getTextRange().getEndOffset() <= endOffset
&& !(element instanceof PsiExpressionStatement)) {
last = element;
element = element.getParent();
}
PsiExpression expr =
PsiTreeUtil.getParentOfType(last, PsiExpression.class, false, PsiClass.class);
if (expr == null) {
return false;
}
if (expr.getTextRange().getEndOffset() > endOffset) {
return true;
}
if (expr instanceof PsiJavaCodeReferenceElement
|| expr instanceof PsiMethodCallExpression
|| expr instanceof PsiArrayAccessExpression) {
return false;
}
return true;
}
@Override
public String handleEmptyLookup(
@NotNull final CompletionParameters parameters, final Editor editor) {
if (!(parameters.getOriginalFile() instanceof PsiJavaFile)) return null;
final String ad = advertise(parameters);
final String suffix = ad == null ? "" : "; " + StringUtil.decapitalize(ad);
if (parameters.getCompletionType() == CompletionType.SMART) {
if (!ApplicationManager.getApplication().isUnitTestMode()) {
final Project project = parameters.getPosition().getProject();
final PsiFile file = parameters.getOriginalFile();
PsiExpression expression =
PsiTreeUtil.getContextOfType(parameters.getPosition(), PsiExpression.class, true);
if (expression != null && expression.getParent() instanceof PsiExpressionList) {
int lbraceOffset = expression.getParent().getTextRange().getStartOffset();
ShowParameterInfoHandler.invoke(project, editor, file, lbraceOffset, null);
}
if (expression instanceof PsiLiteralExpression) {
return LangBundle.message("completion.no.suggestions") + suffix;
}
if (expression instanceof PsiInstanceOfExpression) {
final PsiInstanceOfExpression instanceOfExpression = (PsiInstanceOfExpression) expression;
if (PsiTreeUtil.isAncestor(
instanceOfExpression.getCheckType(), parameters.getPosition(), false)) {
return LangBundle.message("completion.no.suggestions") + suffix;
}
}
}
final Set<PsiType> expectedTypes = JavaCompletionUtil.getExpectedTypes(parameters);
if (expectedTypes != null) {
PsiType type = expectedTypes.size() == 1 ? expectedTypes.iterator().next() : null;
if (type != null) {
final PsiType deepComponentType = type.getDeepComponentType();
if (deepComponentType instanceof PsiClassType) {
if (((PsiClassType) deepComponentType).resolve() != null) {
return CompletionBundle.message(
"completion.no.suggestions.of.type", type.getPresentableText())
+ suffix;
}
return CompletionBundle.message("completion.unknown.type", type.getPresentableText())
+ suffix;
}
if (!PsiType.NULL.equals(type)) {
return CompletionBundle.message(
"completion.no.suggestions.of.type", type.getPresentableText())
+ suffix;
}
}
}
}
return LangBundle.message("completion.no.suggestions") + suffix;
}
@Override
public boolean accepts(
@NotNull PsiSwitchStatement psiSwitchStatement,
ProcessingContext context) {
final PsiExpression expression =
psiSwitchStatement.getExpression();
if (expression == null) return false;
PsiClass aClass =
PsiUtil.resolveClassInClassTypeOnly(expression.getType());
return aClass != null && aClass.isEnum();
}
@Nullable
private static PsiType getQualifierCastType(
PsiJavaReference javaReference, CompletionParameters parameters) {
if (javaReference instanceof PsiReferenceExpression) {
final PsiReferenceExpression refExpr = (PsiReferenceExpression) javaReference;
final PsiExpression qualifier = refExpr.getQualifierExpression();
if (qualifier != null) {
final Project project = qualifier.getProject();
PsiType type = null;
final PairFunction<PsiExpression, CompletionParameters, PsiType> evaluator =
refExpr.getContainingFile().getCopyableUserData(DYNAMIC_TYPE_EVALUATOR);
if (evaluator != null) {
type = evaluator.fun(qualifier, parameters);
}
if (type == null) {
type = GuessManager.getInstance(project).getControlFlowExpressionType(qualifier);
}
return type;
}
}
return null;
}